automation: Update matrix-synapse Docker tag to v1.34.0

This MR contains the following updates:

Package	Update	Change
matrix-synapse	minor	1.33.2 -> 1.34.0

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Release Notes

matrix-org/synapse

v1.34.0

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This release deprecates the room_invite_state_types configuration setting. See the upgrade notes for instructions on updating your configuration file to use the new room_prejoin_state setting.

This release also deprecates the POST /_synapse/admin/v1/rooms/<room_id>/delete admin API route. Server administrators are encouraged to update their scripts to use the new DELETE /_synapse/admin/v1/rooms/<room_id> route instead.

No significant changes since v1.34.0rc1.

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